This should not be the case with normal ListView to Model. Some settings like the ListView.BottomToTop must be making this. You can try with simple example. May be you look at simple example given in the Qt Assistant. After this you can compare with your example.

Model contains sorted list of items. I check once again model and made sure so order in list is correct. When I add to ListView delegate based at Loader and set property "asynchronous: true" i seen so items start showing from the end of model list.